Seyfried, Steffen http://orcid.org/0000-0003-3239-6727
Bussen, Dieter
Joos, Andreas
Galata, Christian
Weiss, Christel
Herold, Alexander
Article History
Accepted: 31 March 2018
First Online: 12 April 2018
Compliance with ethical standards
: The study was approved by the local ethics committee (2017-819R-MA). All patients have given their informed consent to participate.